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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 10-37 (21) days






2. 114 days






3. 30-38 hours after estrus cycle begins






4. Why Dairy calves are fed powdered milk.






5. Front feet and head first. (except for hogs and dogs)






6. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






7. Actual heat cycle (period)






8. The more stressed out the male is - the less sperm he is going to produce






9. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






10. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






11. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






12. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






13. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






14. Provide nourishment for the developing sperm






15. Sperm production






16. 1-2 days






17. Days which have decreasing daylight hours

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18. Male on one pin and female on other side






19. What helps regulate spermatogenesis?






20. Front feet and head first. (except for hogs and dogs)






21. 26 hours after estrus begins






22. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






23. 14-19 (17) days






24. Animals which have only one estrous cycle (ex: dog - fox)






25. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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26. Birthing process (termination of gestation)






27. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






28. 265-285 days






29. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






30. Start of the reproductive tract for the female. located outside of the body






31. What about the sperm for a bull which has been castrated but still has testicles?






32. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






33. Duct through penis that carries sperm and urine






34. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






35. Failure to have both testis (gonads) descend






36. Failure to have one testis (gonad) to descend






37. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






38. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






39. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






40. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






41. ~60 days before calving






42. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






43. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






44. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






45. Animals which have many estrous periods per year (ex: cow - sow)






46. Check feet and legs - look for masculine traits in build such as crest and muscling






47. 147 days






48. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






49. Implies the amount of estrogen production






50. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase